Your Car's Fuse Box Explained: Everything You Need to Know About The Stuff In Fuse Boxes!
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Published 2020-09-05
0:00 Car Fuse Boxes Explained
The automotive fuse box is a hub of protection for the electrical systems in a vehicle.
0:39 What Does a Fuse Do?
Fuses protect circuits and fail when amperage gets too high, so you can replace an easy-to-access and inexpensive fuse rather than whatever expensive part it was protecting!
2:15 What Does a Relay Do?
Relays allow a small current to control a large current. Many switches and computers don't like high amperage, so the relay handles it for them!
3:30 What Does a Diode Do?
A diode only allows current to flow in one direction, protecting components that would be damaged by current travelling in the wrong direction.
4:10 How do You Find The Right Fuse, Relay, or Diode?
Finding the right fuse, relay, or diode is an important step in troubleshooting a circuit/electronic item's issue. There are two main ways to find them, and the best way will differ from vehicle to vehicle.
5:12 How to Remove a Fuse or Relay
Removing a fuse can often be done with a fuse puller, but needle nose pliers also work well. Relays can be a bit tougher, but a dedicated pair of relay pulling pliers can help tremendously!
6:11 Why are There Empty Spaces in the Fuse Box?
Are you missing fuses? Those empty spots may be there on purpose! Sometimes they are there to allow for future-proofing, but other times it's just where a feature would be fused if the vehicle came with that feature.
6:51 Bonus: Less Common Fuse Box Information!
This section contains information about breakers, fusible links, in-line fuse holders, fuse blocks, and more!
9:32 End Thoughts
Do you have any questions about automotive fuse boxes? After finishing the video, feel free to ask in the comments section, and be sure to check out our videos covering specific items from the fuse box in more detail!
Why use a fusible link instead of a fuse?
A fusible link deals with excessive amperage differently than a fuse does. Quick moments of high amperage/current are allowed to happen, but if the amperage is high for too long, or way too high, the fusible link melts/burns away, disconnecting the circuit like a fuse would. Many fusible links are the last bit of wire before the circuit grounds to the chassis.
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All Comments (21)
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Can I get an F in the chat for those fuses that were shorted out for slow motion B-roll footage? Also, here are some related videos: Automotive fuses explained: https://youtu.be/KtRMPIxXP7o • Automotive relays explained: https://youtu.be/t5DU5x7Zz74 • Are Relay Pliers Worth Buying?: https://youtu.be/c7d78Ytwn5E • Automotive Electrical Basics Playlist: https://www.youtube.com/watch?v=HQeKQuAXClc&list=PL0QX2tTK83MWfhwd4pzSEDQZQxwL6-uPq
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I'm an upcoming technician, and I'm starting my job at Ford this week as a quick lane tech. This channel is really gonna help me reach master mechanic
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This is more informative on electronics than most videos. I've been struggling to understand what diodes do but here you made it a world more simple.
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This is one of the most informative videos I've ever seen on any topic. Well done.
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Empty spots in a fuse box can also exist for hidden features. Such as for allowing a vehicle to be towed with no power, by allowing the transmission to shift into neutral and etc.
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Great video. Very detailed & easy to understand.
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Amazing! You are a great teacher
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Very well spoken and depicted.keep making videos.👍👍
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F! Absolutely awesome video. Thanks so much, learned heaps.
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Very well done. Thank you.
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Thank you for sharing your knowledge :-) you have wonderful skills!
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Thx
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Very important information thanks for this video 🙏
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i feel bad for all of the innocent fuses that lost their lives in the making of this video. RIP
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Great video man first video I ever watch but great information 👍👍
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Very thorough! So it should really be called a fuse, relay, transistor, and diode box! :P
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Thank you sir just been insightful
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This was amazing, thank you!
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Dude that was the best video I've ever seen.
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Great vid...thanks man